This rendering benchmark based off of the Cinema 4D engine is a terrific indicator for multi-threaded processing.
POV-Ray 3.7 Beta
POV-Ray has long been the poster child for multi-threaded processing and rendering.
Blender is a free open source 3D engine that is a popular choice amongst college students and small developers.
In Blender Render all four of the SNB parts are not only faster in the single threaded results but also in the dual-thread run!